Motor and clutch control mechanism



D. 21, 194s. J.L..MOODY 2,456,980

IOTOR AND CLUTCH CONTROL MECHANISM Original Filed July 30, 1945 4 Sheets-Sheet 1 FIIE E Jouu'L. MOODY Dec. 21, 1948. J. L. MOODY I 2,456,980-

MCTOB AND CLUTCH CONTROL MECHANISM Original Filed J u1y 30, 1945 4 Sheets-Sheet 2 nvvxnma Joan L. MoooY J. MOODY Moron AND" CLUTCH comm. ugcmnxsu Original Filed July 30, 1945 Dec. 21, 1948.

4 Sheets-Sheet 3 INVENTOR Jdrm L. MoooY 6 A Q Ammy Dec. 2 1, 1948. Y L oo 2,456,980

MOTOR AND CLUTCH CONTROL MECHANISM Original Filed July 30, 1945 -4 Sheets-Sheet 4 m3 Joan L. MOODY BY J Patented Dec. 21,1948

MOTOR AND OLU ICH CONTROL MECHANISM John 1.. Moody,0akland, Calit, min

to Frlllen Calculating Machine 00., Inc., a corporation of California Original application July 80, 1945, Serial No. 607,825. Divided and thirapplioation June 10, 1946, Serial No. 875,565

4 Claims. (Cl. 192-.02)

This invention relates to motors. More specii'ically, this invention relates to self-contained electrical power units and means operable for the control of same". This application is a division of application Serial No. 607,825, filed-July 30, 1945.

An object of this invention is to provide an electrical power unit comprising an electric motor, a switch. a resistor, a terminal block. condensers I .and the necessary electrical wiring to connect Figure l is a plan view of the self-contained electrical power unit.

Figure 2 is an elevation of the same. Figure 3 is a plan view showing how the unit is installed in a machine.

Figure 4 is an exploded view of a coupling. Figure 5 is an elevational section showing a electrical unit from the machine for said repair or replacement.

Referring to Figures 1 and 2, indicates an electric motor of suitable size and shape mounted on grommets 2B and secured to a frame 2i by screws 24 within insulating members '28. Secured to a rotatable shaft of motor 20, is a suitable coupling II with pins 22 capable of transmitting rotation from said motor shaft to a driven part of the calculating machine when the power unit is installed therein as will hereinafter be more fully explained. Mounted on frame 2| is a terminal block I! of insulating material with lead terminals 24 and mounted therein. Electrically connected to lead terminals 34 and 35 are suitable lead connectors and 4| respectively. Secured to the connector III is a lead 42 which is connected at its other end to a field coil of motor 20. (Note: Wir s connecting parts of the power unit are indicated by dash-double-dot lines.) Another lead 43 connects one terminal of a. normally open micro switch 44 to aterminal56 of a dual condenser 52. and intermediate its ends it is secured to connector ll. A lead 5i connects the second terminal of micro switch 44 with a common terminal 52 of dual condenser 52, and intermediate its ends, lead BI is connected to one terminal of a resistor 50.

terminal 53 of condenser 52 is a lead 55 which is part of the control mechanism of a calculating machine.

Figure 6 is an elevational section of a calculating machine showing how the unit is installed in the machine and also the means for controlling the operation of said self-contained power unit.

The electrical power unit is a self-contained driving unit wherein, unlike known electrical power drives, all elements thereof (motor, ter minal block, condensers, resistor,'switch. and the necessary wiring to complete a circuit) are mounted on a single, small plate that may be readily installed in a machine in operative driving relation therewith, or removed therefrom for servicing. In known calculating machines, should the motor switch become damaged, it would be necessary to disassemble the machine to a marked extent in order to repair or withdraw the switch and to install a new one in its place. In the unit connected to the other terminal of the motor 2i].

A lead 82 connects this common motor terminal with a second terminal 54 of the dual condenser 52, and intermediate its ends it is connected to the other terminal of resistor 50.

o The foregoing description of the electrical power unit wiring is not to be construed as the only scheme of wiring for such a unit, but will serve to clarify the functions of the component parts and show that all the necessary wiring is contained within said unit. In other words, as will presently be explained, when the power unit is installed in the machine no electrical connections have to be made between the power unit and the machine.

Integral'with frame 2| are a plurality of ears 22 provided with screw holes 23 to enable. the frame 2| of the electrical power unit to be fastened to the base of the calculating machine.

Referring to Figure 3, BI is the base of a calculating machine. A frame 83 secured to said base has a shaft 64 mounted therein. A coupling 10 (Fig. 4) with pins H is secured to shaft 84. When Also connected to the common the unit is installed in the machine, the coupling II is adapted to be connected to the coupling 3! by means of an intermediate member 12 of insulating material having holes I I to receive pins II and holes ll to receive pins 32.

The base 65 of the calculating machine is provided with an aperture 65 (Fig. 3) generally simi lar to the outline of the base 2| of the electrical power unit, exclusive of cars 22, through which said unit may be introduced for installation in the machine. As shown in phantom lines in Figure 6, the unit is introduced from the underside of the base 65. After the couplings 3i and 1c are brought into alignment, the unit is moved laterab ly from the dotted line position (Fig. 3) to the iull line position. when the couplin pins have been engaged in the holes of the intermediate member I2, the driving connection between the motor 20 and the drive shaft to in the machine is complete. The unit is then to the calcu lator base 55 by screws l passing through the holes 23 in the cars 22.

When the electrical power unit is thus secured to the machine, the microswitch on said unit is disposed in operative relationship with control mechanism in the machine. When the electrical power unit is so positioned in the machine, the control leaf 46 (Fig. 6) of microswitch 44 under lies or an ear 8| on bellcrank 80 pivotall mounted on arm 83 at 82. rm 83 with a stop our M, formed thereon, underlying bcllcrai'ik 80 is guided by pin 86 on machine frame 63. A spring 85 urges bellcrank BI) into engagement with car 84 of arm 83. The other extremity of arm 83 is pivotally connected at 80 to arm 9i secured to a shaft 92 which is rotatably mounted on the machine frame '3. Arm 93, also secured to shaft 52, is pivotally connected at 94 to link 95 plvotally connected to a. conventional clutch control element Hill, by pin 8!.

The elements shown in Figure 5 are generally similar to those described in the patent to Friden No. 2.366345, and'will therefore be only briefly described in this specification insofar as they con trol the operation of the above-described series of levers, links, etc. Plus and minus keys WI and I02, respectively, and division key H3, control in the conventional manner the lateral displacement of slide I03, slidably mounted on the ma chine frame 63 at IM and I05. Abutting the rear end (to the left in Fig. 5) of slide I03 is a pin 96 which, as heretofore explained, interconnects clutch control element I60 with link 95. Thus it will be obvious to those skilled in the art that depression of any operation control key will cause pin 98 (Fig. 5) to be displaced rearwardly.

Viewing Figure 6, rearward displacement of pin 8. causes clutch element I00 to be rotated clockwise about its pivot IIO, thereby effecting engagement of clutch I I I in an orthodox manner. Rearward displacement of pin 95 also moves link 95 rearwardly, thereby rotating arms 93 and shaft 02 in a clockwise direction. Clockwise rotation of arm 9| causes downward movement of arm 83 and lip 8| depresses leaf or switch control element 45, moving it from its normal position to its operated position, and closing the above-described electrical circuit and starting the motor.

In a calculatin machine similar to that disclosed in the above-cited patents to Friden, in a division operation the driving means is not started by the depression or the division key, but by I the return 0! said key to inoperative position.

Thus a diflerent set of conditions must governiii starting the motor in division from those in other operations.

Depression of division key H3 (Fig. 5) causes its associated key stem H2 and cam surface Ill formed thereon to be displaced downwardy, moving follower I I5 in contact therewith, and associated slide I20, laterally (to the left in Fig. 5), essentially as described in the above-mentioned patents to Friden. An car I22 formed on key stem IE2 abuts a pin I 2i secured to pivotally mounted bellcranlz iit (Fig. 6), so that the abovementinned downward displacement of key stem H2 also causes counter-clockwise rotation. of hellcranit no about its pivot Wt against the urgency oi spring M2. At lid bellcranlr is connected to link Nb, guided by slot tilt and pin lit secured to the machine trains. The arm lid is capable oi being displaced (to the right in Fig. 6) to dispose its rear end liii under extension Ella of ear M. "lf'he above-mentioned counter-clockwise rotation or bellcrank i123 will cause link lat to be displaced to the right (Fig. 6} and will project end iti thereof under extension ills of ear 8i, thereby restraining bcilcranlt to from operating switch Mi when the dcvlsion key is depressed.

Depression oi division irey lit (Fig. 5) through cam lid and iollowcr lib moves slide lit, which is slidabiy mounted on frame to by pins its, to the rear, causing pin Mt to rotate crank Mi clockwise about its pivot M2. Crank Mi has pivotally connected thereto ,at Mt a linlr M l which is connected at M5 to a bellcrank Mb pivoted at l5l. Counter clockwise rotation of bellcrani: tilt causes end itt to move pin 1W3 secured in slide I03 toward the rear of the machine, thereby moving pin 95 (Fig. 6) rearwardly, which movement causes engagement of the clutch. 'dvearward movement oi pin 38 also causes dowromrd movement of arm By the action of spring 8t, bellcranls. 8b is urged counterclockwise about center lit to follow ear ill on bellcranlr. so but is blocked or restrained from so doing by the end iii of lint: Mil which is moved under extension Bic when the division key is depressed. Upon release of division key lit (Fig. 5), said key is caused to return to inoperative position by the urgency of spring I54, allowing bellcrank W3 (Fig. 6) to rotate clockwise under the urgency of spring I32, withdrawing the end I3! of link I30 from under ear am of bellcrank enabling said bellcrank to rotate counterclockwise under the urgenc of spring until restrained from further rotation by lip 84 of crank 83. The resulting counter clockwise rotation of bellcrank 80 causes its lip 8i to contact and depress leaf 45 of microswitch 44, thereby starting the motor.

From the foregoing it will be seen that depresslon of any operation control key of the calculating machine will cause the clutch to be engaged in a conventional manner, and will also urge bellcrank B0 to close the microswitch 44 of the power unit. In a division operation, however, the disabling means is operated to restrain the rotation of yieldable bellcrank 80, and resultant closing of microswitch 44, until division key III returns to its raised position, at which time bellcrank 80 is allowed to rotate under the urgency of spring 85, thereby depressing leaf 45 of microswitch 44 to close the motor circuit.

Thus it will be seen that I have provided an electrical power unit which can be readily installed in and removed from a calculating machine, which only requires sliding a coupling into engagement to establish a driving connection between the motor and the drive shaft of the machine and which entirely eliminates the necessity of removing electrical parts individually, disconnecting wiring or mechanically connecting the switch to the calculating machine controls. In addition the power unit when installed in the machine is electrically insulated therefrom by the coupling member 12 and the mounting members 26.

I claim:

1. In an electrically-driven calculating machine,. drive mechanism adapted to be driven by an electric motor, a clutch in said drive mechanism, a control for said clutch, a plurality of machine operation keys, means actuated by depression of any of said keys to operate said clutch control, a motor switch having a control element movable from a normal position to an operated position to render said switch effective, means actuated by said clutch control including a member resiliently urged to move said switch control element from its said normal position to its said operated position,-and means actuated to by one of said keys to restrain said member and Prevent it from moving said control element to its said operated position until release of said one key, whereby said motor switch is closed only after depression and release of said one key and is closed immediately upon depression of another of said keys.

2. In an electrically driven calculating machine, an electric motor; drive mechanism operatively related to said motor", a clutch in said drive mechanism; a control for said clutch; a plurality of machine operation keys; a motor switch having a control element movable from a normal position to an operated positionto render said switch 'eflective; connecting means interposed between said keys and said clutch control, and between said keys and said switchcontrol element for operating said clutch control and said switch control element in response to operation of said keys.

normally to move conjointly; and means actuated by movement of one of said keys in one direction for blocking operating movement of said one of said parts and thus preventing it fromoperating said switch control element until release of said one of said keys and movement thereof in the opposite direction.

4. In an electrically driven calculating machine, an electric motor; drive mechanism operthe connecting means for operating, said switch control element comprising a yieldable member; and means actuated by movement of one of said keys in one direction for. restraining said yieldable member against operative -movement to thereby prevent operation of said switch control element until release of said one or said keys. and

movement thereof in the return direction. v

3. In an electrically driven calculating 'machine, an electric motor; drive mechanism operatively related to said motor; a clutch in said drive mechanism; a control for said clutch;' a plurality of machine operation keys; a motor switch having a control element movable from a normal position to an operated position to render said switch eflective; connecting means interposed between atively related to said motor; a clutch in 'said drive mechanism; a control for said clutch; a plurality of machine operation keys; a motor switch having a control element movable from a normal position to an operated position to render said switch efi'ective; connecting means interposed between said keys and said clutch control, and between said keys and said switch control element for operating said clutch control andsaid switch control element in response to operation of said keys, the connecting meanstor operating said switch control element comprising an arm movable in response to depressing of either of said keys, a lever pivoted on-said arm, a stop on said arm, and a spring for yieldably holding said lever against said stop in position to operate said switch control element upon key-responsive movement of said arm a blocking member; and means responsive to depressing of one of said keys for moving said blocking member into the path of operating movement oi said lever to prevent the latter from operating said switch control element, and respo'nsive to returning of said one of said keys for withdrawing said blocking memberfrom said path to enable said spring to move said lever to operate said switch control element.

'- JOHN L. MOODY.

REFERENCES crran The following references are of record in the file of this patent:

UNITED s'ra'rEs PATENTS Machado Jan. 2, 1945 

